There's this myth that automated spam detection is hard because spammers are all very clever masters of disguise.

No. Spammers are stupid as a shoe. They have dog shit for brains.

Automated spam detection is hard because the line between spam and "legitimate" marketing activity is a fiction.

@danslimmon

that and that the big boys, like google and outlook, who like to think they are too big to block, are huge sources of spam and refuse to clean up their own customer bases. they make money on spammers, not legit users bombarded with spam.